Lock



-c. A msmw.

LUCK.

APPLICATION FILED um. 14, 1922.

iL 'fi wa mama NW 1141, 11922.

2 SHEETS-SUEZ"! l.

A TTOR/l/EYS c. A. PRESCOTT. Lock; APPLICATION FILEE? IAN-14. I922.

Pmmedl NW, M, 922;

2 SHEETSSHEET 2 WITNESSES llii Lid

, w ten LOCK.

Application filed January 14:,

To all whom it may concern Be it known that T, CHAnr-ns A. Pnnsco'rr, asubject of the King of England, and a resident of Victoria, in theProvince of British Columbia, Dominion of Canada, have invented a newand Tmproved Look, of which the following is a full. clear, and oractdescription.

This invention relates to improvements in loclrs, particularly to a lockof the general character disclosed in Letters Patent of the UnitedStates Number 1,123,00, granted to me on December 29, 1914-.

An object of the invention is to provide a look operating along theprinciples disclosed in this previous patent, and yet a loci: which willbe far simpler in construction, less unlikely to get out of order,durable and eilicient in use easy to install and inexpensive tomanufacture.

The invention resides particularly in a novel form of lock casing, anovel means for actuating the latch, and in certain other novel featuresof construction and combina tions and arrangements of parts as will bemore fully hereinafter described and pointed out in the claims.

In the accompanying drawings- Figure 1 is a view in section through myimproved lock;

Figure 2 is a sectional view on the line 2-2 of Figure 1;

Figure 3 is a view in transverse section on the line 33 of Figure 1;

Figure 4. is a similar View on the line 44 of Figure 1;

Figure 5 is another sectional detail view on the line 5-5 of Figure 1;

Figure 6 is a perspective view of the lockmember 37 Figure 7 is aviewsimilar to Figure 1 illustrating av modified form of lock; and

Figure 8 is a perspective view showing the parts of the latch actuatingmechanism in disassembled relationship.

Referring in detail to Figures 1 to 6 inclusive of the drawings. T haveused the reference numeral 1 to designate a closure, such as a door, andthe reference numeral 2 to indicate the closure frame. The door 1 isprovided with a transverse opening or bore 3 extending entirelytherethrough adjacent the free edge thereof and a short opening orpassage 42 extending from the passage 3 to the face of the free edge ofthe door. Plates are attached. to opposite sides of the door 1922.Serial No. 529,172.

by any suitable securing devices such as 6 and have openings thereinregistering with the ends of the passage Sleeves and 8 extending intoand jcurnaled in the ends of the passage 3 are rigidly attached to doorknobs 9 and 10 respectively. These sleeves are of angular internal boreand a. shank 11 of angular cross section fits within and connects thesleeves.

The invention in this case resides partially in the novel constructionof the look casing which I have designated by the reference numeral 12.This casing is tubular including an inner end square in cross section.as inlica-ted at 13, an outer end which is sub stantially circular incross section. as indicated at- 14, and a shoulder 15 at the unction ofthe square and rounded ends of the casing. The squared end of the casingprovided with a pair of oppositely disposed keyhole slots 16 throughwhich the shank 11 passes, the slots being suiiiciently large toordinarily permit turning of the shank.

A plate 17 fixed to the outer surface of the free edge of the door 1 isformed with an opening registering with the passage 4 and es an integralbushing 18 projecting includ into the end of this passage and serving toretain the lock casing 12 in place, said bushing entering the open outerend 0'' b casing. The bushing 18 is tormee. square passagewaytherethrough adapted to guide the sliding movement of a latch 19. Thislatch is movable through the bushing and into a receiving pocket orkeeper 20 in the face of the adjacent frame 2. striking plate 21 securedto the frame is provided with an opening therein exposing the pocket andis formed with a flanged surface 22 which is engaged by the beveled end23 of the latch as the door is swung to, to iacilitate the operation ofthe latch and cushion the closing of the door. Tt will be noted that thelatch 19 is provided with a groove 24 in its lower face. This grooveeffectively prevents forcing of the latch by the use of a wire or othertool since when a wire is forced under the latch and toward. the freeend thereof it will engage in the groove.

A disk 25 fixed to the inner end of the latch is engageable with thebushing 18 to limit the outward movement or projection of the latch.Rigid arms 26 anchored in the disk 25 extend inwardly into the lockcasing 12. These arms include shoulders 2? midway of their length and attheir inner ends terminate in integral hooks 28 engageable with theshank 11, for a purpose described hereafter. A disk 29 is mounted toslide on the arms 26 between the disk and the shoulders 27. A relativelyweak coiled spring 30 interposed between the disks 25 and 29 serve tonormally maintain the disk 29 pressed against the shoulders 27 of thearms 26. Another coiled spring 31 is interposed between the shoulder 15of the lock casing and the other side of the disk 29, this lastmentioned, spring tending to normally effect projection of the boltthrough the medium of the disk 29 and the other spring 30.

A ring 32 is immovable upon the shank 11 and a link 33 pivoted to thering 32 is also connected to the disk 29, said link extending throughthe spring 15 and said disk having openings therein'permitting the linkto slide therethrough, but being positively engaged by the end of thelink to effect retraction of the latch 19 when the shank 11 is turned,as will be readily understood.

It will be apparent from the foregoing description that turning of theshank 11 will effect retraction or projection of the latch 19. It willalso be evident that some means must be provided for locking the latchin extended or projected position, and with this end in view, a spindle3a is journaled within the shank and held against longitudinal movementby a flange 35 engageable with one end of the shank. That end of thespindle which. carries the flange and which is located outside of theshank 11 is'formed with a spiral thread or web 36. A locking member 37is slidable longitudinally in a keyway 38 in the sleeve 7. This lockingmember includes a pair of fingers 39 straddling the spiral web 36,whereby turning of the spindle operates through the medium of the web tomove the locking member 37 longitudinally. As the locking member ismoved longitudinally its inner end 40 will be projected into one of thekey-hole slots 16 where its presenoe will. prevent turning of the shank11., or movement of the hooks 28 should an unauthorized forcing of thebolt be attempted.

The sleeve 8 and the knob 10 are rigidly connected together and a barrel41 is mounted in theknob and extends into-the'sleeve. This barrel isformed with a plurality of internal projections 1-2 adapted to preventthe insertion within the barrel of any key save the proper one which isindicated at d3, as having relatively deep recesses 4: 1 therein, whichpermit the key upon rotation. to pass the lugs. The key 13 is engageablein pockets 15 in the end of the spindle 3 1 to effect turning of thesame and flat springs 46 interposed between reduced flattened portion 47of the spindle and the angular internal walls of the shank 11 preventaccidental turning of the spindle. A barrel 4:1. is

1 ,asasra also provided in the knob '9, but this barrel is not equippedwith the projections 12.

Assuming the latch to be in unlocked position, as seen most clearly inFigure 1, it

is merely necessary to insert the key 43 into the barrel 1].. Turning ofthe key will effect turning of the spindle 34 which will operate throughthe medium of the web 35 to project the locking member 37 into the slot16, thereby locking the shank 11 against movement, as hereinbeforesuggested. It will then be impossible to turn the shank and effectwithdrawal of the latch without first using the key to again turn thespindle and release the locking member 37 When this locking member,however, has been released, turning of either the knob 9 or the knob 10will turn the shank, operating through the medium of the ring 32, link33, disk 29 and arms 26 to positively retract the latch from its keeperagainst the action of the springs 31 and 30. The lock can of course beoperated with equal facility through the barrel 41'.

Referring in detail now to Figures 7 and 8 of the drawings, it will beseen that I have illustrated a slight modification, wherein T havesubstituted for the shank 11, a shank which includes a pair of sections48 and 49. A disk 50 performing the same function as the ring 32 issecured to each section of the shank. These disks are coupled throughthe medium of independent links 51 to a disk 52 having openings thereinreceiving the interminate portions of the links and permitting slidingmovement of the disks upon one link when the other link is pulled.WVith' this form of the device a locking member 53 performing the samefunction as the locking member 37 is provided in the same sleeve whichcarries the barrel 54. This locking member is in like manner operated bya spiral web 55 fixed to the spindle 56. /Vith I this form of thedevice, the split sleeve and the link connections 51 make it possible tooperate the latch with either knob independently of the other knob. Inother words, the door may be locked from the outside and at the sametime may be conveniently opened from the inside, since turning of oneshank does not effect or cause'turning of the other. The remainder ofthe construction of the latch 57, springs 58 and 59, etc. are substantially the same as in the preferred. form hereinbefore described, andthe lock operates in exactlythe same manner. This second form of thedevice is especially suitable for doors in hotels, public buildings,office buildings, etc., where it is desired to make the lockinaccessible from the outside but alwaysv open on the inside of a door,while the first described lock will be convenient in all places wherethe usual mortise locks are used.

Although I have illustrated one of the preferred embodiments ofmy-invention, it

will be obvious that various slight changes and alterations might bemade in the general form and arrangement of the parts described withoutdeparting from the inven tion, and hence I do not wish to limit myselfto the precise details set forth, but shall consider myself at libertyto make such slight changes and alterations as fairly fall within thespirit and scope of the appended claims.

I claim:

1. In a look, a hollow knob shank including an angular internal bore, aspindle turning in the shank, a spring held latch oper able upon turningof the shank, means operable upon turning the spindle to lock said shankagainst turning, and means interposed between the spindle and the flatinterior faces of the shank to prevent accidental turning of thespindle.

2. In a look, a hollow knob shank including an angular internal bore, aspindle turning in the shank, a spring held latch operable upon turningof the shank, means operable upon turning the spindle to lock said shankagainst turning, and means interposed between the spindle and the fiatinterior faces of the shank to prevent accidental turning of thespindle, said means comprising fiat springs, said spindle including aflattened reduced portion providing a seat for said springs.

3. In a look, a tubular lock casing including a squared inner end andcylindrical outer end, an internal shoulder in the casing at thejunction of the squared and cylindrical portions thereof, a latchmovable in the outer end of the casing, a disk associated with saidlatch, and a coiled spring interposed between the disk and shouldertending to project said latch.

4. In a look, a tubular lock casing including a squared inner end andcylindrical outer end, an internal shoulder in the easing at thejunction of the squared and cylindrical portions thereof, a latchmovable in the outer end of the casing, a disk associated with saidlatch, a coiled spring interposed between the disk and shoulder tendingto project said latch, said casing having registering openings throughits inner end, an angular knob shank extending through and turnable insaid openings, arms connected to the latch and engageable with the shankto limit the projection of said latch, said disk having limited slidingmovement on the arms, and a relatively weak coiled spring interposedbelow said disk and latch to cushion the projection of said latch.

5. In a lock, a tubular lock casing including a squared inner end andcylindrical outer end, an internal shoulder in the casing at thejunction of the squared and cylindrical portions thereof, a latchmovable in the outer end of the casing, a dis-k associated with saidlatch, a coiled spring interposed between the disk and shoulder tendingto project said latch, said casing having registering openings throughits inner end, an angular knob shank extending through and turnable insaid openings, arms connected to the latch and engageable with the shankto limit the projection of said latch, said disk having limited slidingmovement on the arms, a relatively weak coiled spring interposed belowsaid disk and latch to cushion the projection of said latch, and meanswhereby turning of the shank retracts the latch against the action ofthe springs.

6. In a look, a tubular lock casing includ ing a squared inner end andcylindrical outer end, an internal shoulder in the casing at thejunction of the squared and cylindrical portions thereof, a latchmovable in the outer end of the casing, a disk associated with saidlatch, a coiled spring interposed between the disk and shoulder tendingto project said latch, said casing having registerinp' openings throughits inner end, an anguIar knob shank extending through and turnable insaid openings, arms connected to the latch and engageable with the shankto limit the projection of said latch, said disk having limited slidingmovement on the arms, a relatively weak coiled spring interposed belowsaid disk and latch to cushion the projection of said latch, and meanswhereby turning of the shank retracts the latch against the action ofthe springs, said means including a link connecting the disk and shankand wherein said disk has limited sliding movement.

7. In a look, a spring held latch, a knob shank including two sections,a spindle mounted to turn in the shank, means whereby turning of eithersection effects retraction of the latch, and means operable upon turningof the spindle to lock one shank section against turning.

- CHARLES A. PRESCUTI.

